Improvement in wrenches



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Patented Aug. 29, 1871.

l No. 118,559;

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UNITED STATES HIRAM N. SMADE7 OF MANISTEE, MICHIGAN.

IMPROVEMENT IN WRENCHES.

Specification forming part of Letters Patent No. 118,559, dated August29, 1871.

To all whom t 'may concern:

Be it known that I, HIRAM N. SMADE, of Manis-` tee, in the county ofManistee and State of Michigan, have invented a new and Improved PipeWrench; and I do hereby declare that the following is a full7 clear, andexact description thereof, which will enable others skilled in the artto make and use the same7refe1encebeing had to the accompanying drawingformingpart of this specification, in which- Figurel represents a sideview of my improved pipe-wrench. Fig. 2 is a detail side view of thestationary jaw-fastener. Fig. 3 is a transverse section onthe line c c,Fig. l.

Similar letters of reference indicate correspon ding parts.

This invention relates to a new pipe-wrench of the kind where themovable jaw is pivoted to a sliding sleeve; and consists particularly inthe mode of fastening the stationary jaws.

A in the drawing represents the handle; B, the main shank; and C, thestationary jaw-holder. All these three parts may be made in one piece,as shown7 or united from separate sections. The jaw-holder C is like ahook on the shank B,with a double-inclined inner edge, c, as is clearlyshown in Fig. l. D D are two' fixed jaws. They are plates7 made of steelor other hard material7 with Toughened or corrugated inner faces. Theyare respectively placed against the inclined edges c c, rest onshoulders b that are formed on the hook C, and meet at their upper ends.Plates E E are secured against the sides of the hook C and fastened bybolts d, which pass through them and the hook7 as in Fig. 3. Theseplates E, by partly lapping over the jaws D, prevent them from fallingfrom the hook C. F is the movable sleeve sliding on the stem B, andoperated by a screw7 Gr, which is swiveled in a projecting ear, c, ofthe handle. H is the movable jaw, pivoted to the upper part of thesleeve F. The pivot-pin f of the jaw H may be made in form of a screw,so that said jaw can be clamped fast in any desired position afterhaving once been adjusted for a certain size of pipe. By the arrangementof the jaws shown the pipe is clamped on three sides7 and thus securelyheld. The lower end of the screw G, below the ear c, has a milled knob7g, so that it can be conveniently turned by the same hand which graspsthe handle.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- The Xed jaws D D, placed against the inclined edges aupon the shouldersb, and held in place bythe plates E, substantially asherein shown and described.

HIRAM N. SMADE. Witnesses:

A. T. MCKAY, SAMUEL S. CoNovEE.

